Two different examples in recommendations. Or is not:

[BestLink]

1. "The Magento application and Elasticsearch are installed on different hosts (Running on separate hosts is secure, enables Elasticsearch to be scaled, and is necessary for proxying to work)": https://devdocs.magento.com/guides/v2.4/install-gde/prereq/elasticsearch.html
2. "Elasticsearch runs on the same host as a web server (The advantage of putting Elasticsearch and the web server on the same host is that it makes intercepting encrypted communication impossible): https://devdocs.magento.com/guides/v2.4/install-gde/prereq/es-config-nginx.html (and analogical topic: https://devdocs.magento.com/guides/v2.4/install-gde/prereq/es-config-apache.html)
   So, what it mean - what (one) recommendation - same or different hosts (or machines)? Or when, how to choose?